summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/pcmcia/pxa2xx_trizeps4.c
blob: d326ba1fa1ce10cbd95fd198c6968d1bea6236b3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/*
 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
 *
 * TRIZEPS PCMCIA specific routines.
 *
 * Author:	Jürgen Schindele
 * Created:	20 02, 2006
 * Copyright:	Jürgen Schindele
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <asm/irq.h>

#include <mach/pxa2xx-regs.h>
#include <mach/trizeps4.h>

#include "soc_common.h"

extern void board_pcmcia_power(int power);

static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	/* we dont have voltage/card/ready detection
	 * so we dont need interrupts for it
	 */
	switch (skt->nr) {
	case 0:
		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
		skt->stat[SOC_STAT_CD].name = "cs0_cd";
		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
		break;
	default:
		break;
	}
	/* release the reset of this card */
	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);

	return 0;
}

static unsigned long trizeps_pcmcia_status[2];

static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				struct pcmcia_state *state)
{
	unsigned short status = 0, change;
	status = CFSR_readw();
	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
				ConXS_CFSR_BVD_MASK;
	if (change) {
		trizeps_pcmcia_status[skt->nr] = status;
		if (status & ConXS_CFSR_BVD1) {
			/* enable_irq empty */
		} else {
			/* disable_irq empty */
		}
	}

	switch (skt->nr) {
	case 0:
		/* just fill in fix states */
		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
		break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
	/* on ConXS we only have one slot. Second is inactive */
	case 1:
		state->detect = 0;
		state->ready  = 0;
		state->bvd1   = 0;
		state->bvd2   = 0;
		state->vs_3v  = 0;
		state->vs_Xv  = 0;
		break;

#endif
	}
}

static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				const socket_state_t *state)
{
	int ret = 0;
	unsigned short power = 0;

	/* we do nothing here just check a bit */
	switch (state->Vcc) {
	case 0:  power &= 0xfc; break;
	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
	case 50:
		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
		break;
	default:
		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
		ret = -1;
	}

	switch (state->Vpp) {
	case 0:  power &= 0xf3; break;
	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
	case 120:
		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
		break;
	default:
		if (state->Vpp != state->Vcc) {
			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
			ret = -1;
		}
	}

	switch (skt->nr) {
	case 0:			 /* we only have 3.3V */
		board_pcmcia_power(power);
		break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
	/* on ConXS we only have one slot. Second is inactive */
	case 1:
#endif
	default:
		break;
	}

	return ret;
}

static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
	/* default is on */
	board_pcmcia_power(0x9);
}

static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
	board_pcmcia_power(0x0);
}

static struct pcmcia_low_level trizeps_pcmcia_ops = {
	.owner			= THIS_MODULE,
	.hw_init		= trizeps_pcmcia_hw_init,
	.socket_state		= trizeps_pcmcia_socket_state,
	.configure_socket	= trizeps_pcmcia_configure_socket,
	.socket_init		= trizeps_pcmcia_socket_init,
	.socket_suspend		= trizeps_pcmcia_socket_suspend,
#ifdef CONFIG_MACH_TRIZEPS_CONXS
	.nr			= 1,
#else
	.nr			= 2,
#endif
	.first			= 0,
};

static struct platform_device *trizeps_pcmcia_device;

static int __init trizeps_pcmcia_init(void)
{
	int ret;

	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
		return -ENODEV;

	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	if (!trizeps_pcmcia_device)
		return -ENOMEM;

	ret = platform_device_add_data(trizeps_pcmcia_device,
			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));

	if (ret == 0)
		ret = platform_device_add(trizeps_pcmcia_device);

	if (ret)
		platform_device_put(trizeps_pcmcia_device);

	return ret;
}

static void __exit trizeps_pcmcia_exit(void)
{
	platform_device_unregister(trizeps_pcmcia_device);
}

fs_initcall(trizeps_pcmcia_init);
module_exit(trizeps_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Juergen Schindele");
MODULE_ALIAS("platform:pxa2xx-pcmcia");